CN218494129U

CN218494129U - Electric push rod mechanism

Info

Publication number: CN218494129U
Application number: CN202221690023.6U
Authority: CN
Inventors: 洪志立; 刘实中
Original assignee: Moteck Electric Corp
Current assignee: Moteck Electric Corp
Priority date: 2022-05-26
Filing date: 2022-06-30
Publication date: 2023-02-17
Anticipated expiration: 2032-06-30
Also published as: TWM639971U

Abstract

The utility model provides an electric putter mechanism contains a base module, a drive module and a load mechanism. The base module comprises a base shell, a cover body and an accommodating space, the driving module comprises a driving rod, a moving part coupled to the driving rod, a first bearing installed in the accommodating space and an actuating unit used for driving the driving rod, the bearing mechanism comprises at least one stopping structure and a first bearing characteristic, and the first bearing characteristic is arranged in the accommodating space and is adjacent to the base shell.

Description

Electric push rod mechanism

Technical Field

The present invention relates to an electric putter mechanism, and more particularly to an electric putter mechanism with a stopper structure for maintaining transmission stability.

Background

Recently, the electric putter mechanism is widely used in various fields, for example: the principle of lifting mechanism of medical bed and reciprocating type rehabilitation equipment is that the motor in the electric push rod mechanism is meshed with worm wheel or gear by means of worm (or main shaft) to drive guide screw rod to rotate, so that the moving member coupled on the guide screw rod can produce linear displacement, and further the goal of lifting or reciprocating movement can be reached.

However, in the transmission mode in which the worm and the worm wheel (or gear) drive the lead screw to rotate, the torque generated by the motor and the reaction force generated when the moving member moves will shift, deform or shake the lead screw, thereby affecting the stability and the stroke precision of the lifting or reciprocating motion. Therefore, how to improve the stability of the electric putter mechanism becomes an important issue in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electric putter mechanism with backstop structure is in order to maintain transmission stability to solve above-mentioned problem.

The utility model discloses an electric push rod mechanism, which comprises a base module, a driving module and a force bearing mechanism; the base module comprises a base shell and a cover body, the cover body is arranged on the base shell, and the base shell and the cover body define an accommodating space together when being assembled with each other; the driving module comprises a driving rod, a moving part coupled to the driving rod, a first bearing installed in the accommodating space and an actuating unit, wherein the actuating unit is coupled to the driving rod and used for driving the driving rod to rotate so that the moving part can move along the driving rod to a first direction or a second direction opposite to the first direction; the force bearing mechanism comprises at least one stop structure arranged in the accommodating space and a first force bearing feature arranged in the accommodating space and adjacent to the base shell, and one end of the driving rod is connected with the first bearing through the first force bearing feature. When the driving rod is stressed to pull against the first bearing feature, the first bearing feature drives the first bearing to abut against the at least one stop structure.

According to an embodiment, the bearing mechanism further includes a second bearing feature disposed in the accommodating space and adjacent to an end of the at least one stopping structure, and an end of the driving rod is connected to the first bearing via the first bearing feature and the second bearing feature; when the driving rod is pushed against the second force bearing feature under the stress, the second force bearing feature pushes against the first bearing, so that the first bearing is abutted against the base shell; when the driving rod is stressed and pulled to the first force bearing feature, the first force bearing feature drives the first bearing to abut against the at least one stop structure.

According to an embodiment, the driving module further includes a second bearing disposed in the accommodating space and/or on the cover, and the first bearing and the second bearing jointly set the driving rod in a manner of being rotatable relative to the base module.

According to an embodiment, the electric push rod mechanism further includes an inner sleeve module movably disposed on the driving rod and including an inner sleeve body movably sleeved on the driving rod; one end of the inner cylinder body is connected to the moving part, and when the driving rod rotates, the moving part drives the inner cylinder body to move along the first direction or the second direction.

According to an embodiment, the electric push rod mechanism further includes an outer sleeve module including an outer sleeve body, one end of the outer sleeve body is fixedly disposed on the cover, the other end of the outer sleeve body has an outer sleeve opening, and the other end of the inner sleeve body extends out of the outer sleeve body or is folded in the outer sleeve body through the outer sleeve opening.

The foregoing and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is read in conjunction with the accompanying drawings.

Drawings

Fig. 1 is a schematic view of the electric push rod mechanism of the present invention.

Fig. 2 is an exploded schematic view of the electric push rod mechanism of the present invention.

Fig. 3 is an exploded view of the electric putter mechanism of the present invention from another perspective.

Fig. 4 is an exploded view of the first bearing and the base module according to the present invention.

Fig. 5 is an exploded view of the first bearing and the base module at another viewing angle according to the present invention.

Fig. 6 is an exploded view of the base module, the driving module and the force-bearing mechanism of the present invention.

Fig. 7 is a schematic sectional exploded view of the electric push rod mechanism of the present invention.

Fig. 8 is a schematic view of the inner cylinder body of the present invention being folded in the outer cylinder body.

Fig. 9 is a schematic view of the inner cylinder body of the present invention extending outside the outer cylinder body.

Description of the reference numerals

1000: electric push rod mechanism

1: base module

10: base shell

11: cover body

111: perforation

12: bolt

S1: containing space

2: drive module

20: driving rod

21: moving part

211: first external thread structure

212: sliding block structure

22: first bearing

221: first side

222: second side

223: shaft hole

23: actuating unit

231: main shaft

24: second bearing

25: transmission combination

251: first transmission piece

2511: gear segment

2512: screw section

252: second transmission member

3: force bearing mechanism

30: stop structure

301: retaining wall

S2: mechanism space

31: first load bearing characteristic

32: second load-bearing characteristic

4: inner sleeve module

40: inner cylinder body

401: first internal thread structure

402: second internal thread structure

41: connecting piece

411: second external thread structure

5: outer sleeve module

50: outer cylinder body

501: outer cylinder opening

502: sliding rail structure

P1: first position

P2: second position

Detailed Description

In order to further understand the present invention, those skilled in the art will be able to specifically list the preferred embodiments of the present invention and to explain the constituent contents and intended functions of the present invention in detail with reference to the accompanying drawings. It should be noted that the drawings are simplified schematic drawings, and therefore, only the elements and combinations related to the present invention are shown to provide a clearer description of the basic structure or implementation method of the present invention, and the actual elements and layout may be more complicated. In addition, for convenience of description, the components shown in the drawings of the present invention are not drawn to scale according to the number, shape, and size of actual implementation, and the detailed scale may be adjusted according to design requirements.

Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and not limiting of the invention.

Although the terms first, second, and third 8230can be used to describe various elements, these elements are not limited by these terms. This term is used only to distinguish one element from another within the specification. Instead of using the same terms in the claims, the elements in the claims may be replaced with first, second and third 823030in the order they are announced. Thus, in the following description, a first element may be a second element in a claim.

Please refer to fig. 1 to 6, fig. 1 is a schematic diagram of an electric putter mechanism according to an embodiment of the present invention, fig. 2 is a schematic diagram of an explosion of an electric putter mechanism according to an embodiment of the present invention, fig. 3 is a schematic diagram of an explosion of another visual angle of an electric putter mechanism according to an embodiment of the present invention, fig. 4 is a schematic diagram of an decomposition of a first bearing and a base module according to an embodiment of the present invention, fig. 5 is a schematic diagram of an explosion of another visual angle of a first bearing and a base module according to an embodiment of the present invention, and fig. 6 is a schematic diagram of an explosion of a base module, a driving module and a load mechanism according to an embodiment of the present invention. The electric push rod mechanism 1000 includes a base module 1, a driving module 2 and a force-bearing mechanism 3. The base module 1 includes a base housing 10 and a cover 11, the cover 11 is mounted on the base housing 10, and when the base housing 10 and the cover 11 are assembled with each other, the base housing 10 and the cover 11 together define an accommodating space S1.

In practice, the base housing 10 and the cover 11 can be assembled by a plurality of bolts 12 (as shown in fig. 4, only one of the bolts 12 is shown in the drawing to avoid the complicated drawing), but the present invention is not limited thereto, and depends on the actual requirements. In addition, the base housing 10 and the cover 11 are detachable into two independent components with substantially equal size, and the detaching manner of the base housing 10 and the cover 11 is not limited to that shown in the drawings of this embodiment, for example, the detachable part of the cover 11 is a plate-shaped upper cover of the base housing 10, which depends on the actual requirement.

Further, the driving module 2 includes a driving rod 20, a moving member 21, a first bearing 22, an actuating unit 23 and a second bearing 24; the driving rod 20 is a screw, the moving member 21 is a nut, and the moving member 21 is coupled to the driving rod 20 by screwing; the first bearing 22 is installed in the accommodating space S1, the actuating unit 23 is coupled to the driving rod 20, and the actuating unit 23 is used for driving the driving rod 20 to rotate, so that the moving member 21 can move along the driving rod 20; the second bearing 24 is disposed in the accommodating space S1. In addition, in the embodiment, the first bearing 22 and the second bearing 24 jointly set the driving rod 20 to be rotatable relative to the base module 1, so that the driving rod 20 can be kept stable and not easily shaken when being driven to rotate by the actuating unit 23.

The force-bearing mechanism 3 includes at least one stop structure 30, a first force-bearing feature 31 and a second force-bearing feature 32, the first force-bearing feature 31 is disposed in the accommodating space S1 and adjacent to the base shell 10, the second force-bearing feature 32 is disposed in the accommodating space S1 and adjacent to an end of the stop structure 30, and one end of the driving rod 20 is connected to the first bearing 22 via the first force-bearing feature 31 and the second force-bearing feature 32.

Referring to fig. 6, the first bearing 22 has a first side 221 and a second side 222 opposite to the first side, wherein the first side 221 faces the base housing 10, and the second side 222 faces the cover 11; the first force-bearing feature 31 includes a first connection portion 311 and a first flange portion 312 protruding from the first connection portion 311, the second force-bearing feature 32 includes a second connection portion 321 and a second flange portion 322 protruding from the second connection portion 321, the first flange portion 312 abuts against the first side 221 of the first bearing 22, the second flange portion 322 abuts against the second side 222 of the first bearing 22, the first connection portion 311 is connected to one portion of the end portion of the driving rod 20, and the second connection portion 321 is connected to the other portion of the end portion of the driving rod 20. In this embodiment, an external thread is formed at the end of the driving rod 20, and the first connecting portion 311 and the second connecting portion 321 respectively penetrate through the first bearing feature 31 and the second bearing feature 32 and form a screw hole, so that the first connecting portion 311 and the second connecting portion 321 can be screwed and fixed at the end of the driving rod 20. In practice, the first bearing 22 further has a shaft hole 223, the first bearing feature 31 and the second bearing feature 32 are respectively disposed in the shaft hole 223 from the first side 221 and the second side 222 of the first bearing 22, and the first bearing 22 can pivot on the first bearing feature 31 and the second bearing feature 32.

Therefore, when the driving rod 20 is forced to push against the second force-bearing feature 32, the second force-bearing feature 32 pushes against the first bearing 22, so that the first bearing 22 is abutted against the base shell 10; when the driving rod 20 is pulled by a force against the first force-bearing feature 31, the first force-bearing feature 31 drives the first bearing 22 to abut against the stop structure 30.

In summary, the first bearing feature 31 and the second bearing feature 32 can both move with the driving rod 20 due to being screwed on the driving rod 20. Therefore, when the driving rod 20 is forced to push against the second bearing feature 32, the second flange portion 322 of the second bearing feature 32 pushes against the second side 222 of the first bearing 22, and further pushes against the first bearing 22 and the base housing 10; when the driving rod 20 is forced to pull the first force-bearing feature 31, the first flange 312 of the first force-bearing feature 31 will pull against the first bearing 22, and further push the first bearing 22 against the stopping structure 30 disposed on the cover 11.

Referring to fig. 2 and 6, the cover 11 has a through hole 111 for the driving rod 20 to pass through, and the stopping structure 30 includes a plurality of retaining walls 301, the retaining walls 301 are disposed along the periphery of the through hole 111 and jointly define a mechanism space S2. In the embodiment, the stopping structure 30 is four retaining walls 301, the four retaining walls 301 are different in size and are arranged at intervals to surround the periphery of the through hole 111, and the size of the mechanism space S2 surrounded by the retaining walls 301 is larger than the size of the second bearing 24, so that the second bearing 24 can be disposed in the mechanism space S2, and the retaining walls 301 can cross the periphery of the second bearing 24, and the size of the first bearing 22 is larger than the size of the mechanism space S2 (accordingly, the size of the first bearing 22 is larger than the size of the second bearing 24), so that the retaining walls 301 can abut against the first bearing 22 besides crossing the periphery of the second bearing 24. In practice, the stopping structure 30 and the cover 11 may be integrally formed, the stopping structure 30 extends from the cover 11 to the accommodating space S1 and is located in the accommodating space S1, and each retaining wall 301 is generally in the shape of an arc plate.

Further, the utility model discloses electric putter mechanism 1000 additionally contains an inner skleeve module 4, and inner skleeve module 4 movably sets up on actuating lever 20, and inner skleeve module 4 contains an inner tube body 40 and a connecting piece 41, and inner tube body 40 is that actuating lever 20 is located to movably cover. One end of the sleeve body 40 is connected to the moving member 21, when the driving rod 20 rotates, the moving member 21 drives the inner cylinder body 40 to move along the first direction or the second direction, the connecting member 41 is connected to the other end of the sleeve body 40, and the connecting member 41 is used for connecting an object (such as a medical or home bed, a massage chair or a reciprocating rehabilitation device).

In the present embodiment, the moving member 21 has a first external thread structure 211, the connecting member 41 has a second external thread structure 411, the end of the sleeve body 40 has a first internal thread structure 401, and the other end of the inner cylinder body 40 has a second internal thread structure 402; the first male thread structure 211 is screwed to the first female thread structure 401, and the second male thread structure 411 is screwed to the second female thread structure 402.

Further, the electric putter mechanism of the present invention further includes an outer sleeve module 5, which includes an outer sleeve body 50, one end of the outer sleeve body 50 is fixed to the cover 11, the other end of the outer sleeve body 50 has an outer sleeve opening 501, and the other end of the inner sleeve body 40 (i.e. the end of the screw connection member 41) extends out of the outer sleeve body 50 or is folded into the outer sleeve body 50 through the outer sleeve opening 501. Therefore, the connecting member 41 of the inner barrel 40 is extended out and retracted into the outer barrel 50, so as to drive the object connected to the connecting member 41 to move in the first direction or the second direction.

It should be noted that the moving member 21 further has a sliding block structure 212, and a sliding rail structure 502 is formed in the outer barrel body 50. In the present embodiment, the sliding block structure 212 is disposed around the outer edge of the moving part 21, and the sliding block structure slidably corresponds to the sliding rail structure 502 and is limited by the sliding rail structure 502 to move only along the first direction or the second direction. In other words, through the cooperation of the slider structure 212 and the slide rail structure 502, the moving member 21 can only move in the first direction or the second direction relative to the outer cylinder body 50, and the moving member 21 does not rotate relative to the outer cylinder body 50.

Please refer to fig. 6 and 7, fig. 7 is a schematic exploded sectional view of the electric push rod mechanism of the present invention. The drive module 2 in turn has a transmission assembly 25 for transmitting the power output by the actuating unit 23 to the drive rod 20. The actuating unit 23 may be a motor and includes a main shaft 231, a worm is formed at an end of the main shaft 231, and the transmission assembly 25 includes a first transmission member 251 and a second transmission member 252; the first transmission member 251 is pivoted on the cover 11 and located in the accommodating space S1, the second transmission member 252 is sleeved on the driving rod 20, and the driving rod 20 and the second transmission member 252 rotate synchronously.

In practice, the first transmission member 251 has a gear section 2511 and a screw section 2512, and the second transmission member 252 is a helical gear and is located between the first bearing 22 and the second bearing 24, and two ends of the second transmission member 252 respectively abut against the first bearing 22 and the second bearing 24. The gear section 2511 is coupled to the end of the main shaft 231 (i.e. the worm), while the screw section 2512 is engaged with the helical gear (i.e. the second transmission 252). Therefore, the actuating unit 23 is used to drive the main shaft 231 to rotate, so as to drive the first transmission member 251 and the second transmission member 252 to rotate, and further drive the driving rod 20 to rotate. However, the present invention is not limited thereto, and the main shaft 231, the first transmission member 251 and the second transmission member 252 may be designed to have other linkage structures according to actual requirements. It should be noted that, by the design of the space between the retaining walls 301, the screw section 2512 of the first transmission member 251 can engage with the helical gear (i.e. the second transmission member 252) through the stop structure 30, and the proper space design will not affect the bearing effect of the stop structure 30, and can reduce the weight of the cover 11.

Referring to fig. 8, fig. 8 is a schematic view of the inner barrel body of the present invention being folded in the outer barrel body. When the movable member 21 is located at a first position P1 during folding, the movable member 21 is adjacent to the cover 11, and the inner cylinder body 40 connected to the movable member 21 is folded in the outer cylinder body 50.

Referring to fig. 9, fig. 9 is a schematic view of the inner cylinder body of the present invention extending out of the outer cylinder body. When the driving rod 20 rotates to move the moving member 21 in the second direction and moves from the first position P1 to a second position P2, the moving member 21 moves away from the cover 11 in the direction of the outer cylinder opening 501, and the inner cylinder body 40 connected to the moving member 21 extends out of the outer cylinder body 50. Of course, when the driving rod 20 rotates in the opposite direction to move the moving member 21 in the first direction, the moving member 21 moves in the direction of the cover 11, and the inner cylinder body 40 is folded in the outer cylinder body 50 (i.e. the state in fig. 9 is returned to the state in fig. 8); certainly, the moving position of the moving member 21 of the present invention is only schematic, and when the moving member is actually used, the moving stroke of the moving member can be set and controlled by the user, which depends on the actual requirement.

In more detail, when the driving rod 20 rotates to move the moving member 21 along the second direction, the moving member 21 applies a first acting force to the driving rod 20 along the first direction, so that the driving rod 20 pushes the first bearing 22 and the first force-bearing feature 31 (or one of the first bearing 22 and the first force-bearing feature 31) to abut against the base shell 10 through the second force-bearing feature 32; when the driving rod 20 rotates to move the moving member 21 along the first direction, the moving member 21 applies a second acting force to the driving rod 20 along the second direction, so that the driving rod 20 drives the first bearing 22 and the second bearing feature 32 (or one of the first bearing 22 and the second bearing feature 32) to abut against the at least one stopping structure 30 through the first bearing feature 31. Therefore, in the design of the present invention, no matter the moving member 21 moves in the first direction or the second direction, the load of the axial acting force can be effectively borne, and the stability of the operation can be maintained.

Compared with the prior art, the electric push rod mechanism 1000 of the present invention has the first load-bearing feature 31, the second load-bearing feature 32 and the stop structure 30, wherein the first load-bearing feature 31 and the second load-bearing feature 32 can move with the driving rod 20 due to the screw engagement with the driving rod 20. Therefore, when the driving rod 20 is forced to push against the second force-bearing feature 32, the second flange portion 322 of the second force-bearing feature 32 will push against the second side 222 of the first bearing 22, and further push against the first bearing 22 and the base housing 10; when the driving rod 20 is forced to pull the first force-bearing feature 31, the first flange 312 of the first force-bearing feature 31 will pull against the first bearing 22, and further push the first bearing 22 against the stopping structure 30 disposed on the cover 11. The utility model discloses utilize first load characteristic 31, second load characteristic 32 and backstop structure 30's design, can transmit the power that actuating lever 20 received to lid 11 and/or base casing 10, stability when maintaining the mechanism action.

Additionally, the utility model discloses a during actuating lever 20 atress, the first load characteristic 31 that is driven by actuating lever 20 and second load characteristic 32 contact with first side 221 and second side 222 of first bearing 22 respectively to make first bearing 22 butt in base housing 10 or butt in setting up the backstop structure 30 on lid 11, promptly the utility model discloses mainly utilize first bearing 22 to come the load, and second bearing 24 mainly is as letting actuating lever 20 can rotate. Therefore, the utility model discloses an electric putter mechanism 1000 only needs to adopt the use of the first bearing 22 of great size as the load, and adopts the second bearing 24 of general specification to reduce cost increases market competition. The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should belong to the coverage of the present invention.

Claims

1. An electric putter mechanism, comprising:

a base module, comprising:

a base housing; and

the cover body is arranged on the base shell, and the base shell and the cover body jointly define an accommodating space when being assembled with each other;

a driving module, comprising:

a drive rod;

a moving member coupled to the driving rod;

the first bearing is arranged in the accommodating space; and

the actuating unit is coupled to the driving rod and used for driving the driving rod to rotate so that the moving piece can move along the driving rod to a first direction or a second direction opposite to the first direction; and

a force-bearing mechanism, comprising:

the stop structure is arranged in the accommodating space;

the first force bearing characteristic is arranged in the accommodating space and is close to the base shell.

2. The electric putter mechanism of claim 1, wherein when the driving rod is forced against the first bearing, the first bearing abuts against the base housing; when the driving rod is stressed and pulled to the first force bearing feature, the first force bearing feature drives the first bearing to abut against the at least one stop structure.

3. The electric putter mechanism of claim 1, wherein the force bearing mechanism further comprises:

the second bearing feature is arranged in the accommodating space and is adjacent to one end part of the at least one stop structure, and one end part of the driving rod is connected with the first bearing through the first bearing feature and the second bearing feature;

when the driving rod is pushed against the second force bearing feature under the stress, the second force bearing feature pushes against the first bearing, so that the first bearing is abutted against the base shell; when the driving rod is stressed to pull against the first bearing feature, the first bearing feature drives the first bearing to abut against the at least one stop structure.

4. The power putter mechanism of claim 1, wherein the drive module further comprises:

the first bearing and the second bearing jointly set the driving rod in a manner that the driving rod can rotate relative to the base module.

5. The electric putter mechanism according to claim 4, wherein the cover has a through hole for the driving rod to pass through, the at least one stopper structure includes a plurality of walls disposed along the periphery of the through hole and defining a mechanism space, and the size of the mechanism space is larger than that of the second bearing, so that the second bearing can be disposed in the mechanism space.

6. The electric putter mechanism of claim 5, wherein the first bearing is sized larger than the mechanism space such that the plurality of retaining walls can abut the first bearing over the second bearing.

7. The electric putter mechanism of claim 3, wherein the first bearing has a first side and a second side opposite to the first side, the first force-bearing feature includes a first connecting portion and a first flange portion protruding from the first connecting portion, the second force-bearing feature includes a second connecting portion and a second flange portion protruding from the second connecting portion, the first flange portion abuts against the first side, the second flange portion abuts against the second side, the first connecting portion is connected to one portion of the end portion of the driving rod, and the second connecting portion is connected to another portion of the end portion of the driving rod.

8. The electric putter mechanism of claim 1, further comprising:

an inner skleeve module movably disposed on the drive rod, the inner skleeve module comprising:

the inner cylinder body is movably sleeved on the driving rod;

one end of the inner cylinder body is connected to the moving member, and when the driving rod rotates, the moving member drives the inner cylinder body to move along the first direction or the second direction.

9. The electric putter mechanism of claim 8, further comprising:

an outer sleeve module, contains an urceolus body, an end of urceolus body sets firmly in the lid, another tip of urceolus body has an urceolus opening, another tip of inner tube body via the urceolus opening stretch out in the urceolus body is external or receive in the urceolus body.

10. The electric putter mechanism according to claim 9, wherein the moving member has a slider structure, and a sliding rail structure is formed in the outer cylinder body, and the moving member is movable in the first direction or the second direction with respect to the outer cylinder body by the engagement of the slider structure and the sliding rail structure, and the moving member does not rotate with respect to the outer cylinder body.